| NSF Org: |
OCE Division Of Ocean Sciences |
| Recipient: |
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| Initial Amendment Date: | May 14, 2004 |
| Latest Amendment Date: | February 17, 2005 |
| Award Number: | 0341412 |
| Award Instrument: | Standard Grant |
| Program Manager: |
Howard J. Spero
OCE Division Of Ocean Sciences GEO Directorate for Geosciences |
| Start Date: | May 1, 2004 |
| End Date: | April 30, 2007 (Estimated) |
| Total Intended Award Amount: | $221,740.00 |
| Total Awarded Amount to Date: | $259,663.00 |
| Funds Obligated to Date: |
FY 2005 = $37,923.00 |
| History of Investigator: |
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| Recipient Sponsored Research Office: |
3 RUTGERS PLZ NEW BRUNSWICK NJ US 08901-8559 (848)932-0150 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
3 RUTGERS PLZ NEW BRUNSWICK NJ US 08901-8559 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): | Marine Geology and Geophysics |
| Primary Program Source: |
app-0105 |
| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.050 |
ABSTRACT
Under this award the PIs will be address the question: What is the effect of calcite saturation on the Mg/Ca - temperature relationship in benthic foraminifera?
They propose an 11 day cruise in the Norwegian Sea to collect about 30 multi-cores and 15 giant gravity cores that cover a range of calcite saturation levels at constant temperature and salinity. Benthic foraminiferal Mg/Ca from lightly saturated waters display a steep decrease with increasing water depth. The current global Mg/Ca-temperature relationship can only explain a fraction of the decrease, leading to the hypothesis that the degree of calcite saturation also affects benthic foraminiferal Mg/Ca at the low temperatures typical of the
majority of the deep ocean. The depth transect from the homothermal and homohaline Norwegian Sea, that was previously studied by Mackensen et al., (1985) provides an ideal opportunity not only to test the hypothesis, but also to quantify the Mg/Ca - calcite saturation relationship at low temperatures. The PI propose to reoccupy the sites that were used for the Mackensen et al. 1985 faunal study (). Based on that study, they expect a high abundance of live benthic foraminifera. To further test their hypothesis they propose studying two down-core records (one spanning the HL-LGM transition at 150 yr resolution and one record spanning 0 to 35 ka at 250 yr resolution). Because Norwegian Sea's bottom water temperature (BWT) is close to freezing, they expect little Glacial-Interglacial variation. Any significant down-core change would suggest additional control on Mg/Ca ratios in benthic foraminifera.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
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